I think great great grand parents are removed enough to not be considered incest. I think you are even safe with second cousins

I get why the screenwriter would think that’s a fun little joke, but I also agree with the critics that it does not belong in an otherwise light and breezy fantasy rom-com. Like, even if it isn’t incest in the legal sense, I don’t know if that sort of thing is what you want your audience contemplating.

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If it’s good enough for Futurama it’s good enough for me

Do you ever get the feelin' you're only goin' with girls because you're spose to...

😠😠😠😠

Wait till they learn about Aragorn and Arwen.

No! And neither do you!

Rule#1 of Time Travel:

NEVER EVER sleep with anyone! NEVER! Might end up being your great-grandmother, or some direct ancestor?

Funnily enough Stuart was portrayed by Liev Schreiber and Leopold by Hugh Jackman. The two would later portray the siblings Sabertooth and Wolverine.

I did do the nasty in the pasty.

...when?

I distinctly remember seeing the movie on some basic cable channel, and it was right out there in the text. It wasn't a subtle reference. She was absolutely his distant relative. He realizes it and gives some aw-shucks speech about the nature of the cosmos and time.

As a perfect extra factoid from checking the Wikipedia page, I love that one of the scenes cut for the change was "A cameo by director James Mangold where he plays a director whose film is being changed to meet the demands of a test screening."

You work out how much of your genome would be identical to the relation to calculate the Relationship Coefficient. As the relative is direct-line, then it's simply how much of your genome is contributed by that ancestor and this simplifies much of the math.

It'd be 6.25% for a great great grandparent.

In terms of centiMorgans, it'd be around 200. Full first cousins share the same as great grandparents (around 850 cM), first cousins once removed would be the same as great great grandparents.

To avoid inbreeding related malady, you usually want shared DNA to be below 10%, ideally below 5%.

As in that it won''t lead to genetic defects? Yes. As in far enough to remove the gross factor? I'd say no.

So you're saying that if I ever got a time machine, going back in time and banging my great great grandma would be cool, right?

Well, if you go back in time on the same timeline your present is on, you would not be able to avoid or force something like that.

Because everything that lead to your existence in the future can't be changed by you in the past. Otherwise, you would not exist and therefore would not be able to travel back in time and change something.

Honestly, judging by the current porn trends that's more of a dare than a threat at this point.

Futurama has proven you wrong; it can make it quite hilarious

Counter point: your mom looks like Lorraine McFly/Lea Thompson

The 60s Elvis movie Kissin Cousins title song included the lyric:

“But we're kissin' cousins 'n that's what makes it all right”

Yes! And that past nastification has had dire consequences!

"Oh, a lesson on not changing the past from Mr. I'm-my-own-grandpa."

I think the level of 'cool' might depend upon her level of 'hot'

Go watch The Flip Side of Dominic Hide for proof of this

Unless you believe in branching timelines

In that case, clap them cheeks cause it won't affect you personally.

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Didn’t James Mangold direct an X-men movie too?

VERILY! And that past-nastification is arguably worse.

Not any of the main films, but he did direct The Wolverine and Logan (arguably the best movie set in that universe).

But what if your mom is really hot and she thinks you're Calvin Klein?

Don't tell me how to live my... * poof *

So you're saying terminator 2 isn't real